Brake



May Q, 1933. A. Y DODGE I 1,908,410

BRAKE Filed May 22, 1930 Mlm /3 /0 INVENTOR BYADIELY DODGE A TT ORNE Y Patented May 9, 1933 UNITED-STATES PATENT OFFICE ADIIEII Y. DODGE, SOUTH BEND, INDIANA, ASSIGNOR T0 BENDIX BRAKE GOMPANY, 0F SOUTH BEND, INDIANA., A CORPORATION OF ILLINOIS BRAKE Application led May- 22,

This invention relates to brakes and morel particularlyto vibration dampers therefor.

It' has been found that the audible vibration of a brake is frequently due to vibrations generated by the brake shoe when in frictional engagement with the brake drum and that these audible vibrations are trans mitted to the backing plate through the anchor bolts and other supporting means for the shoes. It is, therefore, apparent that a means for checking or dampening the vibration in brake shoes is highly desirable and would prove of great advantage in the art.

brake.

Another object of the invention is to provide a cushioned pressure means between the brake shoe and the backing plate of the brake.

A further object of the invention is to provide a spring pressed cushion member interposed between the brake shoes and the backing plate of the brake.

A further object of the invention is to provide a spring pressed means between the web of the shoe and the backing plate of a brake. u A

Yet a further object of the invention is to provide a. brake having a plurality of shoes with supports or steady rests having springs wound thereon between the backing plate and the webs of the shoes with asbestos or other vibration absorbing means interposed between the spring and the web.

A still further object of the invention is to provide a vibration damper of this character which is positive in action, highly eHicient in operation and yet of marked simplicity as a whole and in respect to each of its component parts, so that its manufacture may be economically facilitated, both as respect to parts and their assembly.

Other objects ofthe invention will appear from the following description taken in con- 1930. Serial No. 454,585.

nection with the drawing, which forms a part of this specification, rand Vin which:

Figure` 1 is a vertical sectional view of a brake illustrating the invention as applied;

Figure'2 is an enlarged sectional view substantially on line 2 2, Figure 1;

Figure 3 is an enlarged sectional view substantially on line 3 3, Figure 1;

Figure 4 is a sectional view substantially on line 4 4, Figure 1; and

Figure 5 is a sectional view substantially en line 5 5, Figure 1. f'

Referring to the drawing for more specific details of the invention, 10 represents, a backing plate which may be secured to an axle housing or to a spindle. ,Positioned on the backing plate is a secondary shoe anchor 11 and an auxiliary shoe anchor 12. These anchors 'are suitably insulated from the backing plate as by pa er washers 13 and 14. The backing plate al so has positioned thereon suitable steady rests 15 and a reinforcing plate 16. As shown, the reinforcingplate is suitably secured to'the bacln'ng plate as by studs 17 and the studs also function as steady rests.

Positioned for oscillation on the anchor bolt 12 is an auxiliary shoe 18 and positioned for oscillation on the anchor bolt 11 is a secon-dary shoe 19. The secondary shoe has connecte-d thereto by a pin 20 a primary shoe 21. The auxiliary shoe 18 and the primary shoe 20 have on the free ends thereof shoulders 22 and 23 between which is mounted a cam 24 operated by a shaft 25, journaled in as f the reinforcing plate 16. The shoes are provided with the conventional brake lining as indicated at 26 and areconnected to suitable springs 27 and 28 for returning the shoes to the od position. l

Positioned on the steady rests 15 are helical springs 29. As shown, these springs are wound on the steady rests, so that one end thereof engages the backing plate 1() and 'the other end bears against the web 30 of the brake shoe with an asbestos Washer 31 interposed. lt is, of course, understood that other vibration dampening washers may be emplo ed in lieu of the asbestos washers.

t uitably positioned on .the backing plate and secured thereto in any desirable manner, is a helical spring 32 preferably a volute spring having secured to one end thereof a cup member 33, in which is positioned a felt Washer 34, held against the web of the shoe by the tension of the spring.

These spring' pressed members tend tot 'as indicated by the scope of the appended claims.

Having thus described the various feavolute springend a cushion member bearing against the web of the shoes. l l

8. A brake comprising a supporting member, a member adjacent the supporting member capable of audible vibration in the oper- 'ation of -the brake, a` sound-deadenin member, and resilient means carried by t e supporting member pressing the. sound-deadening member against the second mentioned member.

9. A brake comprising a supporting member, a vlbratory friction member capable of audible vibration in the operation of the brake, a non-metallic sound-deadening mem-q ber, and a resilient member carried by the supporting member urging `the sound-deadening member into compressive engagement with the vibratory member. e

In` testimony whereof, I have hereuntoA signed my name. v

ADI'EL Y.DODGE.

tures of the invention, what I claim is new and desire to secure by Letters Patent is:

1. A brake vcomprising a backing plate, a support on the plate, a brake shoe positioned on the support, a spring on the plate and a sound deadening member between the plate 2. A brake comprising a backing plate, a plurality of shoes positioned on the plate, a resilient member on theplate, and a sound d eadening member between the plate and the s oes.

3. A brake comprising a backing plate, a plurality of shoes positioned on the plate and a cushion member on the plate, and a sound support on the backing plate, a brake shoe on the support, a spring on the bacln'ng plate tand a cushion member between the spring and shoe.

. 6. A brake comprising a backing plate, a plurality of shoes movably mounted onV the plate, means for moving the shoes,steady rests for the shoes-and means interposed 'between the `shoes and the backing plate including ahelical spring and a cushion for dampening vibrations in the shoe.

- 7 A brake comprising a backing plate,la brake drum associated therewith, a plurality of shoes on the backing plate, means for operating-the shoes to engage the drum, means for returning lthe shoes in the oi position and means intermediate the shoes and the backing plate for dampening vibrations including a CERTIFICATE 0F CORRECTION.

PafemNo. i,9os,41o May 9, 1933..

ADIEL Y DODGE.v

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 49, claim 5, before "spring" insert the word "volute"`; and that the said Letters Patent should be read wthths correction therein that the saine may conform to the record o the case in the Patent Oiiice.

Signed and sealed this 8th day of August, A. D. 1933.

M. J. Moore.

(Seal) r A Acting Commissioner of Patents. 

